| Number | From | To | Length km (mi)[1] | Formed [citation needed] | Eliminated [citation needed] |
002 Highway 2 | Hwy 401 in Gananoque (pre-1997: Bantwell Road in Windsor) | Gananoque (pre-1997: Route 338 towards Dorion, QC) | 4.4 km (2.7 mi) | 1925 | 1997-98 (partial) |
003 Highway 3 | Ambassador Bridge in Windsor | Rose Hill Road in Fort Erie (pre-1997: QEW in Fort Erie) | 258.4 km (160.6 mi) (Highway 3 was discontinued between Highway 77 in Leamington and Highway 4 at Tabotville, Ontario) | 1925 | 1997-98 (partial) |
004 Highway 4 | Hwy 3 near St. Thomas (pre-1997: Port Stanley) | Hwy 8 in Clinton (pre-1997: Hwy 24 near Duntroon) | 100.8 km (62.6 mi) | 1925 | 1997-98 (partial) |
005 Highway 5 | Hwy 6 near Waterdown (pre-1997: Hwy 2 in Toronto) | Hwy 8/Hwy 52 near Dundas (pre-1997: Hwy 2 in Paris) | 12.7 km (7.9 mi) | 1925 | 1997-98 (partial) |
006 Highway 6 | Port Dover (pre-1997: Hwy 24 near Norfolk) | Hwy 17 near Espanola | 480 km (300 mi) | 1925 | 1997-98 (partial) |
007 Highway 7 | Hwy 417 near Ottawa | Highway 4 in Elginfield (pre-1997: Highway 40 in Sarnia) | 536.6 km (333.4 mi) (Highway 7 was discontinued between Wiinston Churchill Boulevard at the Brampton and Halton Hills boundary and York Regional Road 48/ Markham By-pass in Markham) | 1925 | 1997-98 (partial) |
007A Highway 7A | Hwy 115 near Peterborough | Hwy 7/Hwy 12 near Port Perry | 48.3 km (30.0 mi) | 1933 | |
008 Highway 8 | Hwy 5/Hwy 52 near Dundas (pre-1970: Niagara Falls; pre-1997: near Grimsby) | Hwy 21 in Goderich | 138.5 km (86.1 mi) | 1925 | 1997-98 (partial) |
009 Highway 9 | Hwy 400 in Newmarket Hwy 23/Hwy 89 in Harriston | Hwy 10 in Orangeville Hwy 21 in Kincardine | | 1925 | 1997-98 (partial) |
010 Highway 10 | Brampton (pre-1997: Hwy 2 in Mississauga) | Hwy 6/Hwy 21/Hwy 26 in Owen Sound | 170.8 km (106.1 mi) | 1925 | 1997-98 (partial) |
011 Highway 11 | Hwy 400 near Barrie (pre-1997: Hwy 2 in Toronto) | TH 72 in Baudette, MN | 1,780 km (1,110 mi) | 1925 | 1997-98 (partial) |
012 Highway 12 | Near Whitby (pre-1997: Hwy 401 in Whitby) | Hwy 93 near Midland | | 1925 | 1997-98 (partial) |
015 Highway 15 | Hwy 401 in Kingston (pre-1997: Hwy 2 in Kingston) | Hwy 7 in Carleton Place (pre-1997: Arnprior) | 113.4 km (70.5 mi) | 1925 | 1997-98 (partial) |
016 Highway 16 | NY 812 in Ogdensburg, NY | Hwy 416 near Prescott (pre-1997: Hwy 17B in Ottawa) | 2.2 km (1.4 mi) | 1925 | 1997-98 (partial) |
017 Highway 17 | Hwy 417 near Arnprior (pre-1997: Route 342 towards Dorion, QC) | PTH 1 towards Winnipeg, MB | 1,950 km | 1925 | 1997-98 (partial) |
019 Highway 19 | Hwy 3 near Tillsonburg (pre-1997: Port Burwell) | Hwy 401 near Ingersoll (pre-1997: Hwy 86 near Listowel) | 18.8 km | 1930 | 1997-98 (partial) |
020 Highway 20 | Near Niagara Falls (pre-1997: Niagara Falls) | Hwy 58 near Allanburg (pre-1997: QEW in Hamilton) | 1.9 km (1.2 mi) | 1930 | 1997-98 (partial) |
021 Highway 21 | Hwy 402 near Wyoming | Hwy 6/Hwy 10/Hwy 26 in Owen Sound | 228 km | 1927 | |
023 Highway 23 | Hwy 7 near London | Hwy 9/Hwy 89 in Harriston | 97.7 km | 1927 | |
024 Highway 24 | Hwy 3 in Norfolk | Cambridge | | 1927 | |
026 Highway 26 | Hwy 6/Hwy 10/Hwy 21 in Owen Sound | Hwy 400 in Barrie | | 1927 | |
028 Highway 28 | Hwy 7 near Peterborough | Hwy 41 at Denbigh | 162.6 km (101.0 mi) | 1928 | |
033 Highway 33 | Hwy 62 in Bloomfield | Kingston | 68.4 km (42.5 mi) | 1930 | |
034 Highway 34 | Hwy 417 near Vankleek Hill | Route 344 in Grenville-sur-la-Rouge, QC | 17 km | 1930 | |
035 Highway 35 | Hwy 401 near Newcastle | Hwy 60 near Huntsville | 196 km | 1931 | |
037 Highway 37 | Hwy 401 in Belleville | Hwy 7 near Madoc | 44 km (27.3 mi) | 1931 | |
038 Highway 38 | Hwy 7 at Sharbot Lake | Hwy 2 (Princess Street) in Kingston | 69.9 (43.4 mi) | 1932 | |
040 Highway 40 | Hwy 401 in Chatham-Kent | Hwy 402 near Sarnia | 91.8 km | 1934 | |
041 Highway 41 | Hwy 7 at Kaladar | Hwy 17 near Pembroke | 156.6 km (97.3 mi) | 1935 | |
048 Highway 48 | Markham | Hwy 12 near Beaverton | 65.9 km (41 mi) | 1937 | |
049 Highway 49 | Prince Edward County | Tyendinaga Mohawk Territory | 5.8 km (3.6 mi) | 1966 | |
052 Highway 52 | Hwy 2 near Hwy 403 | Hwy 8 in Hamilton | 10.5 km (6.52 mi) | |
058 Highway 58 | Hwy 3 in Port Colborne Hwy 20 near Allanburg | Hwy 58A in Welland Hwy 406 in Thorold | 19.5 km (12 mi) | 1935 | |
058A Highway 58A | Highway 58A in Welland Highway 140 in Welland | | 4.4 km (2.7 mi) | 1972 | |
060 Highway 60 | Hwy 11 near Huntsville | Hwy 17 near Renfrew | | 1937 | |
061 Highway 61 | TH 61 toward Grand Marais, MN | Hwy 11/Hwy 17 in Thunder Bay | 61 km (38 mi) | 1937 | |
062 Highway 62 | Hwy 33 in Bloomfield | Hwy 127 at Maynooth | 165.8 km (103.0 mi) | 1937 | |
063 Highway 63 | Hwy 11/Hwy 17 in North Bay | Route 101 towards Témiscaming, QC | 63.5 km | 1937 | |
064 Highway 64 | Hwy 69 at Rutter | Hwy 11 in Verner | | 1937 | |
065 Highway 65 | Hwy 66 near Matachewan | Towards Notre-Dame-du-Nord, QC | 126.7 km | 1937 | |
066 Highway 66 | Hwy 566 near Matachewan | Route 117 towards Rouyn-Noranda, QC | 99.6 km (61.9 mi) | 1937 | |
067 Highway 67 | Hwy 11 at Porquis Junction | Iroquois Falls | 10.9 km (6.8 mi) | 1937 | |
069 Highway 69 | Hwy 400 in Parry Sound | Hwy 17 in Sudbury | 199 km (124 mi) | 1937 | |
071 Highway 71 | Hwy 17 near Kenora | International Bridge in Fort Frances | 194 km (120.5 mi) | 1937 | |
072 Highway 72 | Hwy 642 in Sioux Lookout | Hwy 17 in Dinorwic | 68.4 km (42.5 mi) | 1937 | |
077 Highway 77 | Hwy 401 near Comber | Hwy 3 near Leamington | 22.0 km | 1963 | |
085 Highway 85 | | | 9.8 km (6 mi) | 1934, 2003 | 1981 |
089 Highway 89 | Hwy 9/Hwy 23 in Minto | Hwy 400 near Barrie | 107 km | 1937 | |
093 Highway 93 | | | 24.1 km (15.0 mi) | 1938 | |
094 Highway 94 | Hwy 17 west of North Bay | Hwy 654 near Hwy 11 | 12.4 km (7.7 mi) | 1937 | |
101 Highway 101 | Highway 17 in Wawa | Quebec border | 400 km | 1944 | |
102 Highway 102 | Hwy 11/Hwy 17 in Kaministiquia | Hwy 11/Hwy 17in Thunder Bay | 26.1 km (16.22 mi) | 1972 | |
105 Highway 105 | Hwy 17 near Vermilion Bay | Hwy 618 in Red Lake | 173 km | 1947 | |
108 Highway 108 | | | 30 km | 1958 | |
112 Highway 112 | Hwy 66 near Kirkland Lake | Hwy 11 near Tarzwell | 19.8 km (12.3 mi) | 1953 | |
115 Highway 115 | Hwy 7 east of Peterborough | Hwy 401 west of Newcastle | 57.7 km | 1954 | |
118 Highway 118 | Hwy 11 near Bracebridge | Hwy 28 near Bancroft | 127.8 km (79.4 mi) | 1955 | |
124 Highway 124 | Hwy 11 near Strong and Sundridge | Hwy 69 near McDougall | 76 km (48 mi) | 1955 | |
125 Highway 125 | Hwy 105 near Red Lake | near Cochenour and the Red Lake Airport | 13.6 km (8.5 mi) | 1955 | |
127 Highway 127 | | | 38.8 km (24.1 mi) | 1955 | |
129 Highway 129 | Chapleau | Hwy 17 in Thessalon | 221 km (137 mi) | 1956 | |
130 Highway 130 | Hwy 11/Hwy 17near Thunder Bay | Hwy 61 near Thunder Bay | 13.4 km (8.3 mi) | 1955 | |
132 Highway 132 | Hwy 41 near Dacre | Hwy 60 in Renfrew | 29.9 km (18.6 mi) | 1956 | |
137 Highway 137 | Hwy 401 near Darlingside | Northern terminus of US Interstate 81 | 4.2 km (2.6 mi) | 1965 | |
138 Highway 138 | Hwy 417 near Casselman | NY 37 near Massena, NY | 38 km (23.6 mi) | 1967 | |
140 Highway 140 | | Hwy 3 in Port Colborne | 11.0 km (6.8 mi) | 1972 | |
141 Highway 141 | Hwy 400 near the Parry Sound Airport | Hwy 11 near Port Sydney | 54.3 km (33.7 mi) | 1974 | |
144 Highway 144 | Highway 17 in Sudbury | Highway 101 in Timmins | 271 km | 1965 | |
148 Highway 148 | Pembroke | QC Route 148 | 5.0 km | 1983 | |
| 400-series Highways |
400 Highway 400 | Maple Leaf Drive Overpass in Toronto | Highway 69 in Parry Sound extension to Highway 17 in Sudbury under construction | 205 | 1952 | |
401 Highway 401 | Highway 3 in Windsor | Autoroute 20 towards Montreal at the Ontario and Quebec border | 815 | 1952 | |
402 Highway 402 | Bluewater Bridge in Sarnia | Highway 401 in London | 103 | 1952 | |
403 Highway 403 | Highway 401 in Woodstock | Highway 401 in Mississagua near Toronto | 126 | 1963 | |
404 Highway 404 | Highway 401 in Toronto | Green Lane Rd in East Gwillimbury and Newmarket | 37 | 1977 | |
405 Highway 405 | Queen Elizabeth Way in St. Catharines | Lewiston-Queenston Bridge in Queenston | 9 | 1963 | |
406 Highway 406 | Queen Elizabeth Way in St. Catharines | East Main Street in Welland | 25 | 1965 | |
407 Highway 407 | Highway 403 /Queen Elizabeth Way in Burlington | Highway 7 in Pickering | 108 | 1997 | |
409 Highway 409 | Highway 401 in Toronto | Toronto Pearson International Airport at the Toronto-Mississauga boundary | 6.5 | 1975 | |
410 Highway 410 | Highway 401 in Toronto | Peel Regional Road 14/Mayfield Street in Brampton | 17.7 | 1979 | |
416 Highway 416 | Highway 401 in Johnstown | Highway 417 in Ottawa | 76 | 1996 | |
417 Highway 417 | Highway 17 in Arnprior | Quebec border at Autoroute 40 towards Quebec City | 181 | 1971 | |
420 Highway 420 | Queen Elizabeth Way in Niagara Falls | Stanley Avenue/Niagara Regional Road 102 at Niagara Falls (Formerly at Rainbow Bridge) | 3.8 | 1972 | |
427 Highway 427 | Queen Elizabeth Way / Gardiner Expressway in Toronto | Highway 7 in Vaughan | 21.3 | 1972 | |
451 Queen Elizabeth Way | Peace Bridge in Fort Erie, Ontario | Highway 427 in Toronto ( Formerly at Humber River | 139 | 1939 | 1997 (parial) |
| Decommissioned Highways |
014 Highway 14 | Hwy 62 in Foxboro | Hwy 7 in Marmora | | 1925 | 1997-98 |
018 Highway 18 | Hwy 3 in Windsor | Hwy 3/Hwy 77 in Leamington | | 1930 | 1997-98 |
022 Highway 22 | | | | 1927 | 1997-98 |
025 Highway 25 | | | | 1927 | 1997-98 |
027 Highway 27 | | | | 1927 | |
029 Highway 29 | | | | 1927 | 1997-98 |
030 Highway 30 | | | | 1930 | 1997-98 |
031 Highway 31 | | | | 1927 | 1997-98 |
032 Highway 32 | | | | 1929 | 1997-98 |
036 Highway 36 | | | | 1934 | 1997-98 |
039 Highway 39 | | | | 1934 | 1970 |
068 Highway 68 | | | | 1937 | |
070 Highway 70 | | | | 1937, 1965 | 1959, 1998 |